Baligh means developed. A human is said to be baligh when they have attained the age of puberty or what fiqh has defined as 'adulthood', when a child is not a child anymore and becomes responsible for his or her deeds for which they may entail punishment on Judgement Day.

Depending on who's fiqh interpretations a Muslim follows, the ages of balaghah vary. Often for boys, the age of Balaghah is considered to be 15.5 years of age, whereas for girls it is 9 and up, or when they start to have periods.